首先讨论海洋平台结构缺陷和损伤的特点及在平台结构极限承载力分析中的考虑方法;其次根据平台结构完好和有损状态的极限承载力,定义了平台结构的储备强度和剩余强度;最后,采用导管架式海洋平台结构极限承载力近似分析程序UAP,分析了裂纹类缺陷、凹痕类缺陷、腐蚀、海生物附着、地基土冲刷等对导管架式海洋平台结构极限承载力和安全性的影响,从而为海洋平台结构的维修决策提供了依据。 First of all, the characteristics of the structural defects and damage of the offshore platform are discussed, and the methods of considering the ultimate bearing capacity of the platform structure are discussed. Secondly, the reserve strength and residual strength of the platform structure are defined according to the ultimate bearing capacity of the platform structure in good condition and the damaged condition. The UAP, an approximate analysis program for the ultimate bearing capacity of offshore platform structures, was used to analyze the ultimate bearing capacity and safety of jacket-mounted offshore platform structures such as crack defects, denting defects, corrosion, marine attachment and soil erosion. Influence, so as to provide the basis for the maintenance decision-making of offshore platform structure.